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1/* SPDX-License-Identifier: GPL-2.0-or-later */2/*3 * ALSA interface to ivtv PCM capture streams4 *5 * Copyright (C) 2009,2012 Andy Walls <awalls@md.metrocast.net>6 * Copyright (C) 2009 Devin Heitmueller <dheitmueller@kernellabs.com>7 */8 9struct snd_card;10 11struct snd_ivtv_card {12 struct v4l2_device *v4l2_dev;13 struct snd_card *sc;14 unsigned int capture_transfer_done;15 unsigned int hwptr_done_capture;16 struct snd_pcm_substream *capture_pcm_substream;17 spinlock_t slock;18};19 20extern int ivtv_alsa_debug;21 22/*23 * File operations that manipulate the encoder or video or audio subdevices24 * need to be serialized. Use the same lock we use for v4l2 file ops.25 */26static inline void snd_ivtv_lock(struct snd_ivtv_card *itvsc)27{28 struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);29 mutex_lock(&itv->serialize_lock);30}31 32static inline void snd_ivtv_unlock(struct snd_ivtv_card *itvsc)33{34 struct ivtv *itv = to_ivtv(itvsc->v4l2_dev);35 mutex_unlock(&itv->serialize_lock);36}37 38#define IVTV_ALSA_DBGFLG_WARN (1 << 0)39#define IVTV_ALSA_DBGFLG_INFO (1 << 1)40 41#define IVTV_ALSA_DEBUG(x, type, fmt, args...) \42 do { \43 if ((x) & ivtv_alsa_debug) \44 pr_info("%s-alsa: " type ": " fmt, \45 v4l2_dev->name , ## args); \46 } while (0)47 48#define IVTV_ALSA_DEBUG_WARN(fmt, args...) \49 IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_WARN, "warning", fmt , ## args)50 51#define IVTV_ALSA_DEBUG_INFO(fmt, args...) \52 IVTV_ALSA_DEBUG(IVTV_ALSA_DBGFLG_INFO, "info", fmt , ## args)53 54#define IVTV_ALSA_ERR(fmt, args...) \55 pr_err("%s-alsa: " fmt, v4l2_dev->name , ## args)56 57#define IVTV_ALSA_WARN(fmt, args...) \58 pr_warn("%s-alsa: " fmt, v4l2_dev->name , ## args)59 60#define IVTV_ALSA_INFO(fmt, args...) \61 pr_info("%s-alsa: " fmt, v4l2_dev->name , ## args)62